Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5651838 | Hydrocarbon fired room heater with thermophotovoltaic electric generator | Lewis M. Fraas, James E. Avery | 1997-07-29 |
| 5616186 | Thermophotovoltaic electric generator using low bandgap photovoltaic cells with a hydrocarbon burner and enhanced catalytic infrared emitter | Lewis M. Fraas, Douglas J. Williams | 1997-04-01 |